hydroaminoalkylation of terminal alkenes, 1,3‐dienes, or styrenes allows a direct and highly atom efficient (100 %) synthesis of amines which can result in the formation of two regioisomers, the linear and the branched product. We present a new titanium catalyst with 2,6‐bis(phenylamino)pyridinato ligands for intermolecular hydroaminoalkylation reactions of styrenes and 1‐phenyl‐1,3‐butadienes that delivers the
Olefin Oxyamination with Unfunctionalized
<i>N</i>
‐Alkylanilines
作者:Shuang Gao、Meike Niggemann
DOI:10.1002/adsc.201801407
日期:2019.4
N‐Alkylanilines have rarely been used in oxyamination reactions, due to the normally necessary pre‐functionalization of the N‐atom. Also, the formation of aminium radical cations (ARCs) of anilines bearing alkyl substituents is plagued by the ARC's tendency to instantaneously convert to α‐aminoradicals or iminium ions. We present a readily available reagent combination that addresses both challenges
Titanium-Catalyzed Intermolecular Hydroaminoalkylation of Conjugated Dienes
作者:Till Preuß、Wolfgang Saak、Sven Doye
DOI:10.1002/chem.201203693
日期:2013.3.18
Ti me kangaroo down: Conjugateddienes undergo intermolecularhydroaminoalkylation in the presence of Ti catalyst [Ind2TiMe2] (Ind=η5‐indenyl). This new reaction offers a highly atom‐efficient approach to homoallylic amines from 1,3‐butadienes.
Formation and behavior of intramolecular <i>N-</i>(styrylalkyl)aniline exciplexes
作者:Frederick D. Lewis、Jill M. Wagner-Brennan、Alan M. Miller
DOI:10.1139/cjc-77-5-6-595
日期:——
investigated and for one of the three secondary anilines. More rapid exciplex formation in nonpolar vs. polarsolvents is attributed to the necessity of desolvating the polar aniline singlet in polarsolvents. Intramolecular adduct formation is the major photochemical process for the secondary anilines, but is highly inefficient for the tertiary anilines. The behavior of the intramolecular aniline-styrene
Phthalonitrile derivatives and liquid crystal compositions containing them
申请人:Hitachi, Ltd.
公开号:EP0087963A2
公开(公告)日:1983-09-07
Phthalonitrile derivatives are represented by the formula (I):
wherein X and Y each represents a C1-9 alkyl or alkoxy group,
The compounds are prepared by cyclisation reaction of a butadiene derivative X-CH=CH-CH-CH-Y with fumaronitrile or dicycanoacetylene, followed by oxidation or bromination.
The compounds have a large negative dielectric anis- tropy, and wide liquid crystal range, and are useful, alone or with other liquid crystals, in liquid crystal display devices.
wherein R represents H,
or a halogen atom, where m is an integer of 1 to 9 and n is 0, 1 or 2, but at least one of X and Y does not represents a methyl group, and Y does not represent an alkyl or alkoxy group when X represents
and R' represents an alkyl group.
酞腈衍生物由式(I)表示:其中 X 和 Y 各代表一个 C1-9 烷基或烷氧基,该化合物是通过丁二烯衍生物 X-CH=CH-CH-CH-Y 与烟腈或二氰乙炔发生环化反应,然后进行氧化或溴化而制备的。 该化合物具有较大的负介电常数和较宽的液晶范围,可单独或与其他液晶一起用于液晶显示设备。 其中 R 代表 H 或卤原子,m 为 1 至 9 的整数,n 为 0、1 或 2,但 X 和 Y 中至少有一个不代表甲基,当 X 代表烷基且 R' 代表烷基时,Y 不代表烷基或烷氧基。